NARROW GAUGE to the MINES - RAILFAN PHOTOGRAPHY COLORADO
The huge Argo Mill in Idaho Springs was constructed to process these gold bearing ores, which totaled over the years over $100 million of gold. At a value of the time period of $18 to $35 an ounce, that is over 28 million ounces, with computes to a current value (at $1500 an ounce) of over $42 billion.